31521680

素因数分解:

$2^4\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1129}}^1$

素因数の和:1491

約数の個数: 40

約数和(自身を含む): 73563000

約数和(自身を除く): 42041320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 349, 698, 1129, 1396, 1745, 2258, 2792, 3490, 4516, 5584, 5645, 6980, 9032, 11290, 13960, 18064, 22580, 27920, 45160, 90320, 394021, 788042, 1576084, 1970105, 3152168, 3940210, 6304336, 7880420, 15760840, 31521680]

約数ペア:

[(1, 31521680), (2, 15760840), (4, 7880420), (5, 6304336), (8, 3940210), (10, 3152168), (16, 1970105), (20, 1576084), (40, 788042), (80, 394021), (349, 90320), (698, 45160), (1129, 27920), (1396, 22580), (1745, 18064), (2258, 13960), (2792, 11290), (3490, 9032), (4516, 6980), (5584, 5645)]